fix: correct typos in agent component filename and templates (#13930)

## Summary
- Rename misspelled file `varaiable_aggregator.py` →
`variable_aggregator.py`
- Fix `unkown` → `unknown` in template and frontend constant (3
instances)
- Fix `Finale` → `Final` in customer feedback template (2 instances)

## Test plan
- [ ] Verify variable aggregator component loads correctly
- [ ] Verify agent templates render properly

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: yuj <yuj@ztjzsoft.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-authored-by: Jin Hai <haijin.chn@gmail.com>

agent/templates/customer_feedback_dispatcher.json

@@ -107,7 +107,7 @@
                     "component_name": "Message",
                     "params": {
                         "content": [
-                            "Customer's original review: {begin@customer_review}\n\nFinale review category is: \n{VariableAggregator:FlatBerriesRest@ReviewCategory}"
+                            "Customer's original review: {begin@customer_review}\n\nFinal review category is: \n{VariableAggregator:FlatBerriesRest@ReviewCategory}"
                         ]
                     }
                 },
@@ -590,7 +590,7 @@
                     "data": {
                         "form": {
                             "content": [
-                                "Customer's original review: {begin@customer_review}\n\nFinale review category is: \n{VariableAggregator:FlatBerriesRest@ReviewCategory}"
+                                "Customer's original review: {begin@customer_review}\n\nFinal review category is: \n{VariableAggregator:FlatBerriesRest@ReviewCategory}"
                             ]
                         },
                         "label": "Message",

agent/templates/cv_analysis_and_candidate_evaluation.json

@@ -94,7 +94,7 @@
                                     "type": "integer"
                                 },
                                 "item": {
-                                    "type": "unkown"
+                                    "type": "unknown"
                                 }
                             }
                         }
@@ -252,7 +252,7 @@
                                         "type": "integer"
                                     },
                                     "item": {
-                                        "type": "unkown"
+                                        "type": "unknown"
                                     }
                                 }
                             },

web/src/pages/agent/constant/index.tsx

@@ -416,7 +416,7 @@ export const initialIterationValues = {
 export const initialIterationStartValues = {
   outputs: {
     item: {
-      type: 'unkown',
+      type: 'unknown',
     },
     index: {
       type: 'integer',